Wladimir Wladimirowitsch Klitschko is a Ukrainian professional boxer. He was born on March 25, 1976 in Semipalatinsk, Kazakh SSR, USSR as Wladimir Wladimirovich Klitschko. He is a former world heavyweight champion of three major sanctioning bodies, having held the titles of the WBA, IBF, and WBO (twice); additionally he has held the IBO, Ring magazine, and lineal heavyweight titles. A highly strategic and cerebrally-minded boxer, Klitschko is considered to be one of the greatest heavyweight champions of all time, as well as among the hardest punching knockout artists in the history of the division; his strong jab, straight right hand and left hook being his best weapons.